TCA9538 Datasheet, PDF (3/37 Pages) Texas Instruments – Low Voltage 8-Bit I2C and SMBus Low-Power I/O Expander

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5 Pin Configuration and Functions
TCA9538
SCPS199C – AUGUST 2014 – REVISED OCTOBER 2015
PW, DB Package
16-Pin TSSOP, SSOP
Top View
A0 1
A1 2
RESET 3
P0 4
P1 5
P2 6
P3 7
GND 8
16 _VCC
15 _SDA
14 _SCL
13 _INT
12 _P7
11 _P6
10 _P5
9 _P4
PIN
NAME
NO.
A0
1
A1
2
RESET
3
P0
4
P1
5
P2
6
P3
7
GND
8
P4
9
P5
10
P6
11
P7
12
INT
13
SCL
14
SDA
15
VCC
16
Pin Functions
DESCRIPTION
Address input. Connect directly to V_CC or ground.
Address input. Connect directly to V_CC or ground.
Active-low reset input. Connect to V_CC through a pull-up resistor if no active connection is used.
P-port input/output. Push-pull design structure. At power on, P0 is configured as an input.
P-port input/output. Push-pull design structure. At power on, P1 is configured as an input.
P-port input/output. Push-pull design structure. At power on, P2 is configured as an input.
P-port input/output. Push-pull design structure. At power on, P3 is configured as an input.
Ground
P-port input/output. Push-pull design structure. At power on, P4 is configured as an input.
P-port input/output. Push-pull design structure. At power on, P5 is configured as an input.
P-port input/output. Push-pull design structure. At power on, P6 is configured as an input.
P-port input/output. Push-pull design structure. At power on, P7 is configured as an input.
Interrupt output. Connect to V_CC through a pull-up resistor.
Serial clock bus. Connect to V_CC through a pull-up resistor.
Serial data bus. Connect to V_CC through a pull-up resistor.
Supply voltage
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